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Finding the Fourth Proportional to 893.46, 1,233.47 and 657.21

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Solution

The fourth proportional to 893.46, 1,233.47 and 657.21 is: 907.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.46 : 1,233.47 = 657.21 : x
  2. Step 2: Convert to fraction form
    893.46/1,233.47 = 657.21/x
  3. Step 3: Cross multiply
    893.46x = 1,233.47 × 657.21
  4. Step 4: Simplify right side
    893.46x = 810,645.53
  5. Step 5: Solve for x
    x = 810,645.53/893.46
  6. Step 6: Final answer
    x = 907.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.